Minoura FT-1 combo.

Never used it personally, but it looks like a sound design, and on Amazon it is not much more expensive than the "home mechanic" truing stand. I can't imagine that it wouldn't perform better than it, either.

In an effort to not link to another forum, google search 'minoura FT-1 review' and check the fifth result. There is a longish thread there.

You have to consider if that means 29'er with the tire or not. If the truing stand will work with a 700c wheel then it will work with a 29'er wheel without the tire. Obviously if you are running tubeless that will become an issue, however it takes no more than an extra minute to remove and install the tire/tube, so this truing stand may still be an option for you.